Currently, this is the Taiheimeji era. This is a board controlled by Tokugawa. Inside this segunte there is a group of warriors who support the government. This is the clan Manyuu. In the current era, breasts are all. If you have breasts, you are guaranteed wealth and popularity. If you do not have them, you rarely consider "man." Members of the Manyuu clan help to breed future big breasts. Written on the secret scroll belonging to the clan, they say that there are several methods on how to grow a big, beautiful chest. Chifuce will be the successor of the clan. Nevertheless, she takes a secret scroll and runs away with him, hoping to fight the cruel world that Clan Manyuu created ...